Stone-dressing machine



(No Model.)

3 Sheets-Sheet 1. E. R. CHENEY. STONE DRESSING MACHINE.

Patented 001:. 28, 1884.

Em, I'xmufi: 626mg Fr? WW (No Model.) 1 3 Sheets-Sheet 2. B. R. CHENEY.

' STONE DRESSING MACHINE. I No. 307,093. Patented Oct 28, 1884.

(No Model.) 3 Sheets-Sheet 3.

- E. R. CHENEY.

- STONE DRESSING MAGHINE. No. 307,093, Patented Oct. 28, 1884.

NY PETERS. Phumii'hognphcr. washin mn, D (Iv UNTTED STATES ATENT Trice.

ETHAN R. CHENEY, OF CHELSEA, MASSACHUSETTS.

' VSTONE-DRESSING MACHINE.

FPECIFICATIdN forming part of Letters Patent No. 307.093, dated October 28, 1884:.

' Application filed November 5. 1883.

To aZZ whom it may concern.-

Be it known that I, ETHAN R. CHENEY, of Chelsea, county of Suffolk, State of Massachusetts, have invented an Improvement in Stone-Dressing Machines, of which the follow ing description, in connection with the accompanying drawings, is a specification, like letters on the drawings representing like parts.

My invention relates to a machine for dressing fiat surfaces of stone, and is embodied in a machine of that class in which the cutters, consisting of rotary disks, are revolved by retating cutter-carrying heads, thus moving over and acting upon the surface of the stone in a curved path, the stone itself being mounted on a bed or carriage and fed toward the cutters in the manner of a metal-planing machine. The rotating disk-cutters arefree to rotate on their spindles, and in their movement over the surface of the stone are turned by their contact with the stone, rolling, as it were, upon its surface, thus having the peculiar cutting action of a rolling edge. WV hen, however, the cutters first strike the surface of the stone in machines as heretofore generally constructed, the rolling action does not immediately begin, and greater strain is brought upon the cutter than during its subsequent action when the rolling or rotary movement is going on.

One of the objects of the present invention is to prevent such additional strain upon the cutter when first beginning to operate upon the stone; and it consists in the combination, with the cutter, of a device for imparting a rotary movement to it when first arriving at the surface of the stone 5 and the invention also consists in details of construction to be hereinafterpointed out. Means are also provided for keeping the cutters and their bearings cool and lubricated.

Figure 1 is a plan view, partly in horizontal section, of an apparatus for dressing stone embodying this invention; Fig. 2, a vertical longitudinal section thereof; Fig. 8,.a sectional detail of one of the cutters and its holding device 5 and FI 4, a partial sectional view showing a portion of the supporting upright for the cutter mechanism, only two of the cutters being shown.

The main framework a, provided with uprights I), supporting the tool-operating mech- (No model.)

anism, and the bed or carriage c, with its feeding mechanism (7., for presenting the stone 0 to the cutters, may be of any suitable or usual construction.

Thecutter-actuating shaft, driven by a belt or otherwise, is provided with a pinion, f, meshing with a gear, 9, spliued upon a shaft, h, passing through a bearing in a cross-piece, I), (not shown in Fig. 1,) connecting the uprights I), the said shaft h carrying a pinion, 'L', meshing with a gear, t", mounted on a shaft, is, having fixed upon it the cutter-head m, for revolving the rotating cutters.

The gear '5 meshes with a similar gear, (indicatedin dotted lines, Fig. 1,) which is mounted on a shaft, carrying a cutter head, m, the gears being equal, so that the heads on m rotate in unison in opposite directions, each having a series of slotted arms, which arms each enter the space between two arms of the other head in their rotation, so that the circles traversed by the ends of the said arms intersect or overlap one another.

The shafts k, k, and it have two bearingboxes, n" M, (see Fig. 4,) in a beam, a, mounted on vertical guides in the upright b, and being movable up and down by means of screws 0, to enable the tools to act on thicker or thinner pieces of stone, the shaft h moving longitudinally through the gear 9 as the beam a is thus raised or lowered.

The shafts k L are provided with collars 71:, preferably forged and turned as an integral part of the shaft, by which their weight is supported on the lower bearing, a, on the beam 11., and the upper sides of the said collars are engaged by blocks a, which receive the upward thrust on the shafts derived from the reaction of the stone against the cutters. The said blocks are connected with the beam by bolts a, the nuts a of which may be screwed down as the parts wear away, so as to always maintain a tight bearing on the collars it", so as to prevent shake or end movement of the shaft I.: with relation to the beam at, a result that could not readily be attained if the upward thrust were sustained by a collar or shoulder of the shaft is. hearing against the under side of one of the boxes at or or".

The cutters p are fixed upon hollow spindles p, rotating freely in blocks 1', adapted to be fastened by bolts 5 passing through slotted flanges 8 (see Fig. 4) in adjusted position in the slotted arms of the heads on m. The cutters p are fastened on the spindle p by bolts 1/ passing longitudinally through the said spindle, the nut g)" of the said bolt acting up on a collar, p, interposed between it and the end of the spindle p.

A roller, f, is fastened upon the outside of the collar 1) and rotates with the spindle and cutter. The rollers p are preferably made of rubber or material affording a good frictional surface, and the cross-beam a is provided with a frame, a, supporting friction devices a, (not shown in Fig. 4-,) adj ustably connected therewith by bolts 12, the said devices engaging the rollers 1)" in their revolution at the ends of the arms of the carriages in, just before the cut tcrs arrive at the surface of the stone, thus setting the cutters in rotation with their spindles y before striking the stone, so that they have the proper rotary movement when first begin ning to act. The said friction devices a and rollcrsp" constitute the cutter-turning devices, and may be arranged to operate during the entire revolving movement of the cutteis; but they are only needed at the points where the cutters begin to act upon the surface of the stone, as the rotary movement will then be lcept up by the stone itself. The path traversed by the cutters carried by one of the heads intersects that of the cutters carried by the other head, so that the two series of cutters act upon the entire surface of the stone.

The bearing blocks r for the spindles 1). of cutters are chambered, as best shown in Fig. 3, they preferably having two independent chambers, one of which, 1', is intended to be filled with a lubricant and has apassage leading to the bearing-sur'lhce of the cutter-spindle. The other chamber, 1"", is intended to be filled with water for the purpose of keeping the bearing cool and preferably being provid ed with a discharge-orifice, r", from which the water is permitted to drop upon the edges of the disk-cutters, keeping them cool and the surface of the stone moistened.-

In order to provide a constant supply of water for the chambers while the machine is in 0 )eration the cutter-heads m m are )rovided justably connected with the beam a, to resist the upward pressure on the said shaft when the cutters are in operation, and prevent endwisc movement of the said shaft, substantially as described.

2. In a stonecutting machine, the rotating disk-cutters and their spindles,combined with bearing-blocks for the said spindles, each chambered to constitute a water-receptacle, substantiall y as and for the purpose described.

8-. The cutter-head having radial arms, pro vided with chambered bearing-blocks and rot-z'tting disk-cutters and their spindles in said blocks, combined with a central chamber on the said cutter-head, and radial ducts leading therefrom to the chambered blocks, substantiall y as described.

f. The rotating disk cutter and spindle therefor, combined with a bearing block for said spindle, having chambers, as described, one chamber for a lubricant and communicating with the spindlebearing surface, and the other chamberhaving an orifice through which its contents are discharged upon the cutters, substantially as described.

in testimony whereof I have signed myname to this specification in the presence of two subscribing witnesses.

. ETHAN R. CHENEY.

Jos. l l'ilvnnnom l, W. H. Srosrox. 

